Thread:SunsetKitten/@comment-31267872-20171023214039

just saying you might want to do a slightly different EV thing

Only every 4 EVs register as a stat point. You can do 128/128 - usually it would be 124/128, but there are always those leftover 4 EVs, so if you want to put them into the 124 Attack/SpAtk and change it into a 128 it works.

Same goes for your other Pokémon - those who have 252 EVs in two stats, you can do 4 in a different stat. If they have a variation, you can add on 4 EVs to one of the non-252 EVs. 